Centrifugal pump



A. B. woonY, CENTRIFUGAL PUMP. 7 APPLICATION FILED LUNE24, 1921.

1,431,350, Patented Oct. 10, 1922..

Patented Get. 10, 1922. p entree stares @ZWFHQE.

AZARIAH 1B. WOODY, 0F MOUNTAINVIEVV, "WYOMING.

CENTRIFUGAL PUT/I1.

Application filed June 24, 1921. Serial No. 480,194.

T 0 all whom it m y concern Be it known that 1', Amman B. VVooDY, acitizen of the United States, residing at Mountainview, in the county ofUinta and State of .Vyoming, have invented certainnew and usefulImprovements in Centrifugal Pumps, of which the following is aspecification.

This invention relates to centrifugal pumps provided with horizontallyarranged impellers; and it consists in the novel construct-ion andcombination of the parts hereinafter fully described and claimed wherebythe liquid is pumped and whereby the pump kept constantly primed andready for action. I

In the drawings, Figure 1is a vertical section through a centrifugalpump constructed according to this invention. Fig. 2 is a plan view ofthe same.

A stationary tubular support a is provided, and the casing or chamber 5for the impeller is secured to its upper end. The impeller is providedwith a lower disk 6, and an upper disk 7 of smaller diameter than thelower disk. The upper disk is preferably concave or dished on its uppersurface, and the lower disk may also be concave if desired, but this isnot essential. Impelling arms 8 are secured between the two disks, andare of any approved shape or curvature.

The lower disk 6 has a rim 9 which projects vertically past the upperdisk, and which has an inwardly projecting circumferential flange 10 atits top. which overlaps the edge of the upper disk, and forms an annulardischarge opening with it. The lower disk has a tubular shaft 12 securedto it, and communicating with the space be tween the two disks. Thisshaft 12 is ournaled in the tubular support, and preferably upon ballbearings 14: or other suitable antifriction bearings.

The shaft 12- forms the inlet pipe of the pump, and it is extended inthe well or cistern, from which water or other liquid is to be obtained,to any suitable depth, and is provided with a foot valve and a strainer,not shown, of any approved construction.

The casing 5 is open at the top, and it has a delivery spout 15 on oneside. The impeller is revolved rapidly by any suitable driving devices.16 is secured to the upper disk 7, and gears into a beveled toothedwheel 17 The wheel 17 is secured on a shaft 18 journaled in A beveledtoothed pinion bearings 19 supported by the casing 5, and is revolved bya crank-handle 20.

in order to prime the pump, liquid is poured onto the upper disk 7 untilthe hollow shaft and the rim 9 are filled with liquid up to the level ofthe flange 10. The impeller is then revolved, and it raises the liquidand discharges it over the edge of the flange 10 into the casing 5 bycentrifugal force. The liquid is retained by the rim 9 on top of theupper'disk when the pump is not in action, and the pump is always primedand ready for action in consequence.

The casing 5 is open at its top, so that water can be poured into theshallow pan formed by the concave top of the plate 7. This is desirablein a hand pump which is only used at intervals, as the water in theupper part of the pump evaporates. The concavity of this plate 7 causesthe water to force out all air from under the flange 10, and aconsiderable body of water is retained on the plate 7 where it can beseen before commencing to turn the crank 26. When the impeller isrevolved, the flange 10 retains the water on the plate 7 and seals theannular passage around it, until a speed is attained which is suilicientto cause the water to rise freely in the suction pipe 12 which isconnected directly to the underside of the lower disk. This constructionenables the pump to be started and operated with facility and certainty,and is particularly desirable in a hand operated pump, in which theimpeller is revolved at a slower speed than in a pump driven by a steamengine.

\VhatT claim is:

1. in a centrifugal pump, an impeller formed of two disks havingimpelling arms between them, the upper disk being concavoconvex andhaving its concave side uppermost, and the lower disk having an inletpipe secured directly to it at its center and a rim at its peripherywhich projects upwardly past the upper disk and is provided at its topwith an inwardly projecting flange which projects over the edge of theupper disk and forms with it an annular delivery passage.

2. In a centrifugal pump, the combination, with an impeller formed oftwo disks hav ing impelling arms between them, the upper disk beingconcavo-convex and having its concave side uppermost, and the lower diskhaving an inlet pipe secured directly to it at itscenter and a rim atits periphery which projects upwardly past the upper disk and isprovided at its top with an inwardly projecting flange which projectsover the edge of the upper disk and forms With it an annular deliverypassage; of an impeller casing having a discharge opening at one side,and a tubular support secured to the bottom of the casing and providedwith upper and lower hearings in which 10 the said inlet pipe isjournaled.

In testimony whereof I have affixed my signature.

AZARIAH B. WOODY.

